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NBME 20 Answers

nbme20/Block 4/Question#39

A 30-year-old woman develops serum sickness ...


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FA 2019 pg 400:

Mast cells... can be activated by tissue trauma, C3a and C5a, surface IgE cross-linking by antigen (IgE receptor aggregation) --> degranulation --> release of histamine, heparin, tryptase, and eosinophil chemotactic factors.